Asset loading

src/asset/asset.c

@@ -12,14 +12,62 @@
 #include "asset/assettype.h"
 #include "engine/engine.h"
 #include "debug/debug.h"
+#include "util/string.h"
 
 errorret_t assetInit(void) {
   memoryZero(&ASSET, sizeof(asset_t));
 
   #if DOLPHIN
+    // Init FAT driver.
+    if(!fatInitDefault()) errorThrow("Failed to initialize FAT filesystem.");
+
+    char_t **dolphinSearchPath = (char_t **)ASSET_DOLPHIN_PATHS;
+    char_t foundPath[FILENAME_MAX];
+    foundPath[0] = '\0';
+    do {
+      // Try open dir
+      DIR *pdir = opendir(*dolphinSearchPath);
+      if(pdir == NULL) continue;
+
+      // Scan if file is present
+      while(true) {
+        struct dirent* pent = readdir(pdir);
+        if(pent == NULL) break;
+        
+        if(stringCompareInsensitive(pent->d_name, ASSET_FILE) != 0) {
+          continue;
+        }
+
+        // Copy out filename
+        snprintf(
+          foundPath,
+          FILENAME_MAX,
+          "%s%s",
+          *dolphinSearchPath,
+          ASSET_FILE
+        );
+        break;
+      }
+
+      // Close dir.
+      closedir(pdir);
+
+      // Did we find the file here?
+      if(foundPath[0] != '\0') break;
+    } while(*(++dolphinSearchPath) != NULL);
+
+    // Did we find the asset file?
+    if(foundPath[0] == '\0') {
+      errorThrow("Failed to find asset file on FAT filesystem.");
+    }
+
+    ASSET.zip = zip_open(foundPath, ZIP_RDONLY, NULL);
+    if(ASSET.zip == NULL) {
+      errorThrow("Failed to open asset file on FAT filesystem.");
+    }
     errorOk();
   #endif
-  
+
   // Engine may have been provided the launch path
   if(ENGINE.argc > 0) {
     // Get the directory of the executable